On https://en.wikipedia.org/wiki/Wikipedia:VisualEditor/User_guide#Editing_templates it is said that "hidden templates" on a page are displayed as a puzzle icon. Yet every template that I've created is displayed this way and I've not "hide" them or anything. How do I make a template display properly in VisualEditor like that example on a said page with "International health organisations"?
Topic on Extension talk:VisualEditor/Flow
For anyone dealing with this : parsoid logs were filled with "non-200 response: 302" "Error: Template Expansion failure". It was because of HTTP to HTTPS redirect settings of the site. A fix was to alter apache config to not redirect on localhost. More on this problem here : https://phabricator.wikimedia.org/T65613
Thanks for the tip! It wasn't obvious since I never looked at the parsoid logs.